“We are eager to trace the man responsible as soon as possible. I would ask anyone who was in the Blaeberryhill Park area of Whitburn on the evening of November 30 and saw anything suspicious, to get in touch with us.

“I would also ask anyone who has a CCTV camera in the Blaeberryhill Park area to contact us and allow officers to view any relevant footage.”

The suspect is described as white, in his 20s or 30s, and around 5ft 6in.

He was of slim to average build and wore a dark hooded top, dark trousers and woollen gloves.

Anyone with information is asked to contact police on 101, quoting incident number 3446 of November 30, or call Crimestoppers anonymously on 0800 555 111.